ProSolo ODO Optical Dissolved Oxygen Meter

An evolution of the Professional Series water quality meters, the ProSolo DIGITAL handheld replaces the ProODO as YSI’s most advanced optical dissolved oxygen field meter. Paired with the latest optical DO and temperature (ODO/T) probe, the ProSolo benefits from years of expertise in cutting-edge dissolved oxygen technology.

The ProSolo handheld is the direct replacement for the ProODO Optical Dissolved Oxygen handheld that was discontinued on Dec. 31, 2018.

Choose an ODO/T cable below to complete your sampling system.

ODO® Sensor Technology

Dissolved oxygen measurement technology has advanced from electrochemical sensors, such as polarographic and galvanic, to luminescent-based, optical sensors. YSI optical DO sensors are non-consumptive, meaning oxygen is not consumed during the measurement. As a result, there is no flow dependence or stirring required with ODO, allowing for the most accurate readings in the field.

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Additional Information

  • Higher accuracy with no stir dependence
  • Less drift over time; holds calibration longer
  • Less maintenance; no membranes or electrolyte
  • Ergonomic handheld for a comfortable grip
  • Easy-to-read color display and backlit keypad
  • Large onboard memory with storage capacity for over 100,000 data sets
  • Site ID and Data ID tag capabilities for data organization
  • Data export directly to USB flash drive (included)
  • Single cable design for probe assembly lengths ranging from 1- to 100-meters
  • Long-life rechargeable lithium-ion battery that is user-replaceable
  • Simple and quick calibration procedures
ProSolo Specifications
Dimensions8.3 cm width x 21.6 cm length x 5.6 cm depth; 567 g (with battery)
PowerRechargeable lithium-ion battery pack provides ~48 hours with the handheld only;

Battery recharge time is ~ 9 hours with the AC power adapter;

The instrument can also be powered via AC or external power through the USB port

Operating Temperature0 to 50°C
Storage Temperature0 to 45°C with battery installed;

0 to 60°C without battery installed

DisplayColor, LCD graphic display;

3.9 cm width x 6.5 cm height

Memory>100,000 data sets

Units: mmHg, inHg, mbar, psi,
kPa, atm

Range: 375 to 825 mmHg;

Accuracy: ±1.5 mmHg from 0 to 50°C;

Resolution: 0.1 mmHg;

Sites and Data ID100 user-defined sites and 100 user-defined data ID tags;

Site pictures can be sent to the handheld via KorDSS Software

Calibration Records400 detailed calibration records can be stored and are available to view, download, and print (printing only available via KorDSS Software)
LanguagesEnglish, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese,
Chinese (Simplified & Traditional), Korean, Thai
CertificationsCEC, CE; RoHS; IP-67; WEEE; FCC; UN Part III, Section 38.3, Test methods for lithium-ion batteries (Class 9)
WarrantyNMEA 0183; requires user-supplied GPS and YSI 6115 Y-cable
ODO Specifications
Size2.46 cm diameter, cable options for 1, 4, 10, 20, 30, 50, and 100 m lengths
Dissolved Oxygen

(Optical luminescence)
Units: % saturation, % saturation
local, mg/L, ppm

Range: 0 to 500%, 0 to 50 mg/L

Accuracy: 0 to 200%: ±1% of reading or 1% saturation, whichever is greater

200 to 500%: ±8% of reading

0 to 20 mg/L: ±0.1 mg/L or 1% of reading, whichever is greater

20 to 50 mg/L: ±8% of reading

Resolution: 0.01 mg/L and 0.1%, or 0.1 mg/L and 1% (auto-adjusts based on range)


Units: °C, °F, K

Range: -5 to 70°C (temperature compensation range for DO mg/L measurement: -5 to 50°C )

Accuracy: ±0.2°C

Resolution: 0.1°C or 0.1°F (auto-adjusts based on range)

Warranty2 years on cable, probe, and ODO sensor cap

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